body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 15px;
    min-width: 300px;
}

.container {
    max-width: 400px;
}

h1 {
    color: #333;
    font-size: 1.5rem;
    margin-top: 0;
    border-bottom: 2px solid #4CAF50;
    padding-bottom: 10px;
}

.settings {
    background: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.theme-select {
    margin: 15px 0;
}

select {
    padding: 5px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-left: 10px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

.instructions {
    background: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.instructions h2 {
    font-size: 1.2rem;
    margin-top: 0;
    color: #333;
}

.instructions ol {
    padding-left: 20px;
    font-size: 0.9rem;
    line-height: 1.6;
}

.key {
    display: inline-block;
    background: #e9e9e9;
    border: 1px solid #ccc;
    border-radius: 3px;
    padding: 0 5px;
    font-family: monospace;
    margin: 0 2px;
}